For https://bugzilla.redhat.com/show_bug.cgi?id=1986176: if we are trying to reexecute, and this fails for any reason, we shouldn't try to execute /sbin/init or /bin/sh. It is better to just freeze. If we freeze it is easier to diagnose what happened, but if we execute one of the fallbacks, we don't really know what will happen. In particular the new init might just return, causing the machine to shut down. Or we may successfully spawn /bin/sh, which could leave the machine open.
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